• Many people can't tolerate wheat-based products, meaning cookies and cakes can be tough to come by. Fortunately, many gluten-free desserts can be made without scouring the shelves for expensive flour substitutes and cake mixes. Here are five gluten-free desserts.

• Comets are the rogue cousins of our solar system family, flashing about space with brilliant tails streaming behind them. Here's a primer on what some experts call the "dirty snowballs" of space.